I'm building a system which is intended to supply a microcontroller with a smoke-detection alarm. I'm currently intending to base the circuit on a Microchip RE46C190, which I can source fairly easily.
The datasheet has a typical-application circuit on page 21 which looks suitable for adaptation, but I need advice on how to remove the piezo transducer from the design (as I don't require an audible output; I intend to link the IO pin to the microcontroller). I gather that
FEED will need to be tied to one of the rails (when not in test mode, anyway), but what should I do with pins
HB which are intended to drive the transducer? Can I simply leave then unconnected, and omit